<template>
  <div class="home">
    <el-select v-model="value" @change="change" placeholder="请选择">
      <el-option
        v-for="item in options"
        :key="item.value"
        :label="item.label"
        :value="item.value"
      >
      </el-option>
    </el-select>
    <el-form
      :model="ruleForm"
      :rules="rules"
      ref="ruleForm"
      label-width="100px"
      class="demo-ruleForm"
    >
      <el-form-item label="活动名称" prop="name">
        <el-input v-model="ruleForm.name"></el-input>
      </el-form-item>
      <el-form-item label="活动区域" prop="region">
        <el-select v-model="ruleForm.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai"></el-option>
          <el-option label="区域二" value="beijing"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="即时配送" prop="delivery">
        <el-switch v-model="ruleForm.delivery"></el-switch>
      </el-form-item>
      <el-form-item label="活动性质" prop="type">
        <el-checkbox-group v-model="ruleForm.type">
          <el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
          <el-checkbox label="地推活动" name="type"></el-checkbox>
          <el-checkbox label="线下主题活动" name="type"></el-checkbox>
          <el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
        </el-checkbox-group>
      </el-form-item>
      <el-form-item label="特殊资源" prop="resource">
        <el-radio-group v-model="ruleForm.resource">
          <el-radio label="线上品牌商赞助"></el-radio>
          <el-radio label="线下场地免费"></el-radio>
        </el-radio-group>
      </el-form-item>
      <el-form-item label="活动形式" prop="desc">
        <el-input type="textarea" v-model="ruleForm.desc"></el-input>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  data() {
    return {
      ruleForm: {
        name: "",
        region: "",
        date1: "",
        date2: "",
        delivery: false,
        type: [],
        resource: "",
        desc: "",
      },
      rules: {
        name: [
          { required: true, message: "请输入活动名称", trigger: "blur" },
          { min: 3, max: 5, message: "长度在 3 到 5 个字符", trigger: "blur" },
        ],
        region: [
          { required: true, message: "请选择活动区域", trigger: "change" },
        ],
        type: [
          {
            type: "array",
            required: true,
            message: "请至少选择一个活动性质",
            trigger: "change",
          },
        ],
        resource: [
          { required: true, message: "请选择活动资源", trigger: "change" },
        ],
        desc: [{ required: true, message: "请填写活动形式", trigger: "blur" }],
      },
      options: [
        {
          value: "1",
          label: "黄金糕",
        },
        {
          value: "2",
          label: "双皮奶",
        },
        {
          value: "3",
          label: "蚵仔煎",
        },
        {
          value: "4",
          label: "龙须面",
        },
      ],
      value: "2",
    };
  },
  mounted() {
    this.change();
  },
  methods: {
    change() {
      this.$refs.ruleForm.clearValidate();
    },
  },
  watch: {
    value: {
      immediate: true,
      handler() {
        if (this.value === "1") {
          this.rules = {
            name: [
              { required: true, message: "请输入活动名称", trigger: "blur" },
              {
                min: 3,
                max: 5,
                message: "长度在 3 到 5 个字符",
                trigger: "blur",
              },
            ],
            region: [
              { required: true, message: "请选择活动区域", trigger: "change" },
            ],
            type: [
              {
                type: "array",
                required: true,
                message: "请至少选择一个活动性质",
                trigger: "change",
              },
            ],
            resource: [
              { required: true, message: "请选择活动资源", trigger: "change" },
            ],
            desc: [
              { required: true, message: "请填写活动形式", trigger: "blur" },
            ],
          };
        } else if (this.value === "2") {
          this.rules = {
            region: [
              { required: true, message: "请选择活动区域", trigger: "change" },
            ],
          };
        } else if (this.value === "3") {
          this.rules = {
            type: [
              {
                type: "array",
                required: true,
                message: "请至少选择一个活动性质",
                trigger: "change",
              },
            ],
          };
        } else {
          this.rules = {
            resource: [
              { required: true, message: "请选择活动资源", trigger: "change" },
            ],
          };
        }
      },
    },
  },
};
</script>
